Gear pump



Feb. 21, 1928. 1,660,287

' G. E. wlLLERs GEAR PUMP Filed Dec. 18. 1924 my Ww 5y @15M i A Tro/vfns.

Patented Feb. 2l, 1928.

UNITED STATES PATENT OFFICE.

GEORGE E. WILLERS, 0F LAWRENCEBURG, INDIANA, ASSIGNOR T0 A. D. COOK, INC., OF LAWRENCEBURG, INDIANA, A CORPORATION OF INDIANA.

GEAR PUMP.

l Application filed December 18, 1924. Serial No'. 756,649.'

My invention relates to gear pumps and or other liquid which may b e easily attached to the bearing of a driven shaft and which is simple in construction, easy to adjust and repair, rugged and durable in use, and very economical to operate. These several objects I accomplish by the novel construction hereinafter described and claimed. Referring to the drawings forming part of this specification, p

Figure 1 represents a vertical cross section of my device taken along the lines 1-`1 in Figure 2. Figure 2 is a front view showing the inlet and outlet of the liquid Which is pumped. Y

The pump or engine frame generally indicated at 1 has a driven shaft 2 on which the bushing 3 of any anti-friction metal is mounted. Surrounding the bushing therev is a sleeve Il in which the bushing has bearing, which for the particular require-y ments of a rigid setting for my pumps, I have provided with a rflange 5, and I have cast the sleeve integral With the liange. This sleeve formingthe bearing for the shaft is shown as being attache-dto the pump frame by machine bolts 6. Over the flange of the bearing and with holes 7 matching the threaded holes in it there is attached a plate 8 which has an opening 9 in axial alignment with the axis of the driven shaft. As a further support for this plate an annular shoulder 1() is litte'd into the opening in the flange of the bearing. This plate has another hole 11 which provides the journal bearing for the support of the hub 12 ofthe'driven gear in the gear pump. Two meshing gears are provided which have hubs extending out from them, the driving gear having a hub 13 of larger diameter than that of thedriven gear and which' fitsinto the collar o-f the base plate axially alignedWith the shaft 2. This construction is of particular importance as it .provides a Wide bearing surface in the place Where it is most neededl as will be hereinafter shown. The meshing gears are journaled on the outside by hubs 14 of similar size, which fitfinto holes 15 in the are thus snugly fitted 'into openings in the cover plate Whichvis lirinly secured to the base plate by tlireadedbolts 17. The oil pump is driven by studs or pins 18 which 'extend inwardly from the large hub of the driven gear and which fit into holes v19 which are drilled into the rotating shaft in aligned position. The liquid to be pumped `enters the pump from an `opening in thev .cover plate 20 which is extended for threaded connection with any desired size of pipe. Opposed to the inlet is another extension 21 ofthe cover plate which is also extended for i threaded connection with any desired sized P1P@- The simplicity of construction of my def en gear and the cover plate. Much of the Wear on the pump parts is carried by the large hub of the driving gear journaled in the shoulder of the base plate, but for purpose offrepair, when it is necessary, all that need be done is to lremove the cover plate and replace, the Worn part. Uneven Wear on the gears may also be equaliz'edby removingl the cover plate and reversing the driven gear by putting the outside hub into theV opening in the base plate Where the inner hub had previously been rotating.

` Having thus described struction of my Vinvention which I desire to secure by Letters Patent, what I claim is: f In a device of the character specified, in

combination with a rotatable shaft, andi a member surrounding an end of said shaft, a detachable pump assembly comprising a base plat-e and a cover plate vvith adriving gear having a hub journaled in said base plate,

with means connected with said hubr forming a drivingk `connection with said rotatable shaft, and means for detachably mounting said assembly-oii said member surrounding the end of said shaft, With a driven gear also journaled Within said base plate and saidcover plate, With a depression in said cover plate and an equally sized depression 'in said base plate Withsaid driven gear journaled-in said depressions, said gearreversible in position Within said assembl .Y exterior cover plate 16. The meshed gears Y.

GEORGE E. WILLER the particular con- 

